Add firmware nanopb protocol core

inc/keyboard_proto.h

@@ -0,0 +1,64 @@
+#ifndef KEYBOARD_PROTO_H__
+#define KEYBOARD_PROTO_H__
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include <pb_decode.h>
+#include <pb_encode.h>
+
+#include "KeyBorad/proto/keyboard.pb.h"
+
+#define KEYBOARD_PROTO_MAX_BODY_SIZE   64U
+#define KEYBOARD_PROTO_MAX_FRAME_SIZE  128U
+#define KEYBOARD_PROTO_FUNCTION_BITMAP_SIZE 29U
+
+enum keyboard_proto_transport {
+	KEYBOARD_PROTO_TRANSPORT_CDC = 0,
+	KEYBOARD_PROTO_TRANSPORT_GATT,
+};
+
+typedef bool (*keyboard_proto_send_body_fn)(
+	const struct keyboard_cdc_CdcPacketBody *body,
+	void *user_data);
+
+bool keyboard_proto_encode_body(
+	const struct keyboard_cdc_CdcPacketBody *body,
+	uint8_t *buffer,
+	size_t buffer_size,
+	size_t *encoded_size);
+
+bool keyboard_proto_decode_body(
+	const uint8_t *buffer,
+	size_t buffer_size,
+	struct keyboard_cdc_CdcPacketBody *body);
+
+bool keyboard_proto_encode_cdc_frame(
+	uint32_t packet_type,
+	const struct keyboard_cdc_CdcPacketBody *body,
+	uint8_t *buffer,
+	size_t buffer_size,
+	size_t *encoded_size);
+
+bool keyboard_proto_try_take_cdc_frame(
+	uint8_t *buffer,
+	size_t *buffer_size,
+	struct keyboard_cdc_CdcFrame *frame);
+
+bool keyboard_proto_build_function_key_event_body(
+	uint16_t usage,
+	bool pressed,
+	struct keyboard_cdc_CdcPacketBody *body);
+
+bool keyboard_proto_build_led_state_body(
+	uint8_t led_mask,
+	struct keyboard_cdc_CdcPacketBody *body);
+
+bool keyboard_proto_handle_host_body(
+	const struct keyboard_cdc_CdcPacketBody *body,
+	enum keyboard_proto_transport transport,
+	keyboard_proto_send_body_fn send_fn,
+	void *user_data);
+
+#endif /* KEYBOARD_PROTO_H__ */